Entry

Primary entry

"Primary entry" is publicly available in the DDBJ/EMBL/GenBank databases and the sequence of primary entry has been experimentally determined by submitter.
Confer: TPA (Third Party Data)

Primary citation

"Primary citation" is the main paper for the sequence of the entry.
In principle, primary citation is indicated in the REFERENCE 2 of DDBJ flat file.In the case of no schedule for publication except INSD, [Published Only in Database] is indicated.
Since REFERENCE 2 indicates the publication status of the sequence, the reference which does not describe about the submitting sequence is indicated as REFERENCE 3 or after, not as REFERENCE 2.